package cn.njxzc.examples;

import java.util.Set;
import java.util.HashSet;
import java.util.Collections;

public class Exam8_14 {
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public static void main(String[] args) {
		Set set = new HashSet();
		set.add("to");
		set.add("be");
		set.add("not");
		set.add("to");
		set.add("be");
		set = Collections.unmodifiableSet(set);
		set.add("Clara");
	}
}